book about it debuted at number two sunday on the "new york times" list of the best- selling e-books. margaret warner sat down with the authors a few days ago. . >> warner: if barack obama's 2008 k578 pain road on on a message of hope and change this year's campaign against mitt romney was pore like a long slog. now less than six weeks after the election, more than a month before inauguration, two journalists at "politico" have published an ebook about the campaign focusing especially on the final 34 days. the end of the line, available only on-line is the last in their series of four ebooks on the 2012 contest. the authors are senior reporters jonathan martin and glenn thrush and they join me now. congratulation, gentlemen on your book. >> thank you very much for having us. >> warner: let's just set the context for a minute. if you go back to say mid 2011, the conventional wisdom was president obama would have a very hard time given how bad the economy was, given how high unemployment was. what was your conclusion based on this reporting about whether he and his campaign won this ye